Strip coiling apparatus



R. c. BRUNNER 2,728,533

STRIP COILING APPARATUS Dec. 27, 1955 4 Sheets-Sheet 1 Filed Oct. 30, 1953 4 I r .i J

l Bay fifirunner Dec. 27, 1955 Filed Oct. 30, 1953 Fig. 2.

R. C. BRUNNER STRIP COILING APPARATUS 4 Sheets-Sheet 2 INVENTOR Ray CBrunner la @[R 1W Dec. 27, 1955 R. c. BRUNNER STRIP COILING APPARATUS 4 Sheets-Sheet 3 Filed Oct. 30, 1953 y r 3 m w m wfiaw jl M f i IUTIhIiIF J INVENTOR Bay CiBruuner 1955 R. c. BRUNNER 2,728,533

STRIP COILING APPARATUS Filed Oct. 30, 1955 4 Sheets-Sheet 4 Tigfi. Ti z FRI 01? ART INVENTOR Ray dBrunnc-r United States PatentO STRIP COILING APPARATUS Ray C. Brunner, Beaver, Pa., assignor to Jones & Laughlin Steel Corporation, Pittsburgh, Pa., a corporation of Pennsylvania Application October 30, 1953, Serial No. 389,321

8 Claims. (Cl. 242--76) This invention relates to apparatus for coiling metallic strip. It is more particularly concerned with apparatus for coiling electrotinplated strip steel. Electrotinned strip steel is commercially made by passing steel strip continuously through electrotinplating apparatus. The product of this operation must either be coiled or cut into sheets and, as the latter operation cannot be carried out as rapidly as modern high speed lines can deposit tin, substantially all such strip is coiled as it leaves the electrotinning line. If such a tinning line produces tinned strip of a single width only, the electrotinning process may be regulated so that tin is uniformly deposited across the width of the strip, and the coiling of such strip can be adequately accomplished with apparatus known to the art prior to my invention to be described. If, however, an electrotinning line is required to produce tinned strip of a range of widths, it is not commercially feasibie to adjust the electroplating process so that the deposit of tin across the width of the strip is entirely uniform for every width of strip plated. Strip of certain widths plated in such a line will have a slightly heavier deposit of tin at its edges than over its center portion, and strip of other widths may show other forms of unequal tin distribution. It should be understood that these inequalities in coating thickness across the strip may be well within the commercial limits for the grade of tin plate being manufactured, but when such strip is coiled into a coil which may have an overall diameter on the order of six feet, a uniform unequal distribution of coating across the width of successive wraps of such a coil may result in pronounced bowing or stretching of the strip as the coil is built up. Material deformed in coiling does not lie flat when uncoiled and does not produce sheets of commercially acceptable flatness when sheared. No coiling apparatus known to me prior to my invention was capable of satisfactorily coiling such strip, nor was apparatus known which could rapidly and conveniently accommodate itself to strip of various widths.

It is an object of myinvention, therefore, to provide coiling apparatus capable of rapid adjustment to strip within a substantial range of widths.

It is another object of my invention to provide such apparatus with means automatically indicating to the operator the width of strip which it is adjusted to coil.

It is another object of my invention to provide strip coiling apparatus which will coil strip having uneven distribution of coating into large diameter coils without bowing or otherwise deforming the material so coiled.

It is a further object to provide apparatus described above which also has the known advantage of accommodating itself to random lateral movement of the strip being coiled.

Other objects will appear in the course of the description of my invention.

As has been mentioned, strip to be electrotinned is commercially passed in a predetermined path through electrotinning apparatus prior to coiling. It is not practicable to define this path laterally of the strip within 2,728,533 Patented Dec. 27, 1955 limits so narrow that the tin strip may be wound up directly on a coiling mandrel. The random lateral movement of the strip passing through the tinning line which must be tolerated is such that if the strip is directly coiled, successive wraps will not be directly superimposed but may be offset to varying extents and in a random manner. A coil such as this is commercially undesirable, since a wrap projecting outwardly to any substantial amount beyond the adjacent wraps may be easily damaged. It is commercially desirable that coils of strip display no wraps which extend substantially beyond adjacent wraps. For this reason coiling apparatus has been devised which moves laterally in accordance with the lateral movements of the strip being coiled, and so produces coils having substantially planar end faces. Such known coiling apparatus is provided with means disposed ahead of the coiler to sense the lateral movement of the strip approaching the coiler and means actuated by such sensing means to move the coiler laterally in correspondence therewith. My invention is an improvement on apparatus of this type. The apparatus of my invention is so constructed that the sensing means may be moved laterally toward or away from the strip path so as to provide a reference point for lateral compensation which corresponds with the width of the particular strip being coiled. My apparatus is also provided with an indicator actuated by such movement of the sensing means, which indicator may be calibrated directly in strip widths for the convenience of the coiler operator. The apparatus of my invention is likewise provided with means for imparting uniform reciprocating lateral motion to the sensing means so that the coiler mandrel in following such movement can ofiset successive wraps in such manner that the coil produced will have end faces which are sinuous in profile. In coils so wound the offsetting of successive wraps positions regions having relatively heavier coatings in one wrap adjacent regions having relatively lighter coatings in adjacent wraps so that even with large diameter coils the strip coils evenly and is not bowed or distorted in coiling. As the offsetting of successive wraps may be positively controlled to produce a smoothly rounded wavy coil end profile, no wrap projects so far beyond adjacent wraps that it can be damaged.

A present preferred embodiment of my invention is illustrated in the accompanying figures to which reference is now made.

Figure 1 is a plan view of coiler apparatus embodying my invention.

Figure 2 is an end elevation of a portion of the apparatus shown in Figure 1, taken on the plane II-H.

Figure 3 is an enlarged view of a portion of the apparatus of Figure 2.

Figure 4 is a side elevation of the apparatus of Fig ure 3, taken on the plane VI-IV.

Figure 5 is a side elevation of the apparatus of Figure 3, taken on the plane VV.

Figure 6 is an enlarged view of a portion of the apparatus of Figure 3.

Figure 7 is an elevation of the apparatus of Figure 6.

Figure 8 is a perspective of an element shown in section and elevation in Figures 6 and 7, respectively.

Figure 9 is a perspective of another element shown in section and elevation in Figures 6 and 7, respectively.

Figure 10 is a cross section, to an exaggerated scale, on a plane through the axis of a coil of strip coiled in accordance with my invention.

Figure 11 is a like cross section of a coil of strip conventionally coiled.

Reference character-1 indicates the strip which may be coming from electrotinning apparatus not shown. My apparatus includes a rotatable coiling mandrel 2 driventhrough suitable gearing 3 and coupling means 4 by driviiig means 5, which is most conveniently an electric motor. This apparatus is mounted upon a movable base 8 which can slide laterally with respect to the strip path upon a fixed base element 9. This lateral movement is effected by hydraulic cylinder 10, the piston rod 11 of which is coupled to base member 8. Hydraulic cylinder 11) is provided with fiuid supply lines 12 and 13 at either end. Affixed to base element 8 is a horizontally extending arm 15.

Adjoining the above described apparatus and ahead of it in relation to the travel of the strip 1 is another base assembly 17 supporting assembly 18 upon which carriage 19 can move laterally with respect to the strip. Assembly 18 may be provided with rollers 2121 upon which carriage 19 moves. Motion is imparted to carriage 19 by screw 23 which extends beneath carriage 19 and turns in nut 24 which is attached to carriage 19. Screw 23 is affixed to shaft 26 which is journaled at either end in assembly 18 in front bearing and rear bearing 29 and is driven through coupling 27 by screw motor 28. Carriage 19 is pivotally connected by vertical stud 30 and nut 31 to the shorter arm 32 of an L-shaped lever designated generally by the reference character 33. This lever 33 is pivotally connected at the junction of its shorter arm 32 and longer arm 34 to arm 15 by vertical stud 36 and nut 37.

Affixed to carriage 19 are upwardly extending vertical members 4% and 41, the latter being positioned at the end of carriage 19 nearer the strip 1 and the former being horizontally spaced therefrom. Member 49 is provided with bearing elements 42 and 44 positioned one above the other and extending through element 40, and element 41 is provided with like bearing members 43 and 45. Bearing element 42 is aligned with like element 43 and bearing element 44 is aligned with like element 45. in the former pair is positioned shaft 48 and in the latter pair shaft 49, the ends of which nearer the strip 1 terminate in crosshead 59. These shafts 48 and 49 move freely in their respective bearing members in a direction at right angles to the path of the strip 1. Movement may be imparted to crosshead 59 by hydraulic cylinder 51 which is supported by vertical elements 48 and 41, piston rod 52 of this cylinder being attached to crosshead 59. Hydraulic fluid supply lines 54 and 55 are provided at either end of cylinder 51, these lines being connected through valves 56 and 57 respectively with hydraulic fluid supply line 58. Valves 5s and 5'7 may be positioned at any point convenient to the operator of the coiler and are shown in Figure l on the opposite side of the strip 1 from the other apparatus of my invention.

A round shaft 68 is positioned above and parallel to shaft 49 and is journaled at each end for free rotation in bearing element 61 in member 4t and like element 62 in member 41. Shaft 63 is provided with a spiral groove 63 disposed about its circumference intermediate its ends. Shaft 4% has afi'ixed thereto intermediate its ends a collar 64 provided with upwardly extending pin 65 which projects into groove 63 of shaft 69. The end of shaft 6% remote from the strip 1 is provided with sprocket 67. A circular dial 6% is supported vertically above member 40 by bracket 69. Dial 68 is formed with a hub 79 which journals freely rotating shaft 72 provided at one end with a sprocket '73 aligned with sprocket 67 of shaft 69. A sprocket chain 74 connects sprockets 6'7 and 73. The other end of shaft 72 carries a pointer 75.

Base member 17 likewise supports structure upon which are mounted a rotary hydraulic fluid pump 81 which is driven by electric motor means 82. This pump 81 is adapted to supply hydraulic fluid to hydraulic cylinder 10 through either line 12 or 13. The output of pump 81 is connected to lines 12 and 13 through a valve means operated by'movement in its axial direction of shaft 85. The outer end ofshaft 83 is pivotally connected to the long end 34-of lever arm 33 through stud 85. This con- 1 nection is made in such manner that element 34 can move with respect to Stud 85 in a direction parallel to the long axis of element 34.

Crosshead 5i carries the means for sensing lateral movement of the strip 1, which is designated generally by reference character 99. Vertical plate 91 is affixed directly to crosshead 59 and also to flange plate 92 and horizontal plate 93 which extends out from vertical plate 91 toward the path of the strip 1. Plate 93 is provided with horizontal ways 94 and 95 in which member 96 may slide freely toward and away from the path of the strip. Member 96 supports a photoelectric cell in housing 98 and by means of bracket 99 a source of light in housing 181. Housing 101 is aligned vertically with housing 98 so that light from the light source contained within housing 181 impinges directly on the photocell in housing 98. The movement of member 96 causes photocell housing 98 and light source housing 101 to move with it as a unit.

Horizontal member 93 is provided throughout the greater part of its length with an opening through which an element 183 attached rigidly to member 96 projects downwardly below the bottom of plate 93. This element 103 terminates in a cross member 1% provided with a flat bottomed horizontal channel 1% extending in the direction of travel of the strip 1. Flange 92 supports an electric motor 118 having a vertically extending shaft terminating at its upper end in a horizontally disposed circular face plate 111 which is provided with an eccentricaily positioned freely rotatable roller 112. Roller 112 is positioned within channel 1&6 of cross member 105. Elements 111, 112, and 1116 constitute a crank and slide mechanism for converting rotary into linear motion.

The electrical current generated by the photocell in housing 98 is transmitted through conductors 120 to suitable means 121 for amplifying this current and controlling therewith the electrical power supplied to motor 28. This means 121 is connected to motor 28 through suitable wiring 123 and to the electrical supply lines through suitable wiring 124. Mandrel drive motor 5 is likewise connected to a suitable source of electrical power through conductors 126, and pump motor 82 is connected to a source of electrical power through conductors 128. The light source in housing 101 is connected to a source of electrical power through leads 1311. Motor is connected to a source of electrical power through leads 131.

The operation of the above described embodiment of my invention will now be described. It will be assumed that electric motor 110 is not operating so that sensing means 90 maintains a fixed position with respect to cross-head 50. It will likewise be assumed that the position of crosshead 50 with respect to carriage 19 has been set to align sensing means 90 with the nominal position of the edge of strip 1 traveling to mandrel 2. As the specificsensing means and associated control means employed by my apparatus are not parts of my invention and as the operation of photocell means to sense the position of fluctuating objects such as strip coming from electrotinning apparatus is known and is likewise not in itself a part of my invention, itwill be sufiicient to say that the impingement of light from the light source in housing 101 on the photocell in housing 98 causes this photocell to generate current which passes through conductors to control apparatus 121. If an opaque body such as the strip 1 is interposed between housings 98 and 101, the current from the photocell will be reduced or cut off altogether. The control apparatus 121 is adjusted so that over an intermediate range of photocell current corresponding to the interception by strip 1 of a predetermined portion of the light from the light source in housing 101 screw motor 28 does not operate. If the photocell current increases beyond this range, which occurs when strip 1 moves out of the beamof light, the screw motor 28-is caused to rotate in the direction which moves carriage 19 and therefore sensing means 90 toward the strip '1, thereby reducing-the amount-of light falling on the photocell to the point where screw motor 28 ceases to operate. If the photocell durrent decreases, the apparatus moves sensing means 90 in the opposite direction until balance is restored.

Let it be assumed that the strip 1 being wound on mandrel 2 is initially aligned with sensing means 90 so that screw motor 28 is inoperative. When the strip 1 moves laterally away from carriage 19, for example, the photocell and associated control mechanism causes screw motor 23 to rotate shaft 26 through coupling 27 in such manner that the rotation of screw 23 causes nut 24 to move toward strip 1, thus moving carriage 19 in the same direction as well as the sensing means 90. This movement of carriage 19 causes lever arm 33 to pivot about stud 36 supported by arm 15, which for the moment will be considered to be stationary. The movement toward strip 1 of shorter arm 32 of lever arm 33 causes the outer end of longer arm 34 to move toward rotary pump 81, pushing shaft 83 inwardly, which causes hydraulic fluid to be shut ofi from line 12 and introduced into line 13. This hydraulic fluid from line 13 enters the rear of hydraulic cylinder and pushes piston and piston rod 11 toward the strip 1, which moves base assembly 8 carrying the mandrel 2 and its associated drive mechanism toward strip 1 in amount corresponding to the movement of sensing means 90. Thus, the strip 1 continues to be wound in such manner that each wrap is superimposed directly on the preceding Wrap without the off-setting which would follow the lateral movement of the strip if the above described sequence of operations had not taken place.

The movement of base assembly 8 moves arm carrying pivot 36 toward the strip, and it will be seen that if carriage 19 is considered to be momentarily stationary, this movement of pivot 36 causes lever arm 33 to move in a direction opposite to that imparted to it by the initial movement of carriage 19. This reverse movement of lever 33 cuts down the flow of hydraulic fluid to the rear of hydraulic cylinder 10 through line 13 and tends to increase the flow of hydraulic fluid to the front end of hydraulic cylinder 10 through line 12 so as to counteract the initial movement of mandrel 2. This mechanical feedback prevents overshooting by mandrel 2 and stabilizes the operation of the apparatus.

Now let it be assumed that it is desired to coil strip of a width different from that to which the apparatus is adjusted. It would be possible to start up the apparatus without aligning sensing means 90 with the edge of the strip of altered width, and the apparatus itself would adjust mandrel 2 to the proper position through the sequence of operations as above described, but it will be apparent that where appreciable travel of sensing means 90 is required, an appreciable time would intervene before mandrel 2 would be properly positioned. The wraps of strip wound in the interim, therefore, would be substantially offset one from another. My apparatus is designed and constructed to avoid this undesirable condition. Before commencing to coil strip of a new width, the operator of my apparatus, by opening valve 56 and closing valve 57, can cause hydraulic cylinder 51 to move crosshead 50 toward the strip path, for example, or by opening valve 57 and closing valve 56, he can cause crosshead 50 and attached sensing means 90 to move away from the strip. He can thus position sensing means 90 at the edge of the strip of new width so as to provide immediately the proper reference point for the automatic operation of my apparatus as described above. The movement of shaft 49 in its axial direction carries collar 64 and projection 65 with it. As projection 65 fits into the spiral grooves 63 cut into shaft 60, linear movement of projection 65 produces rotational movement of shaft 60. This rotation is transmitted through sprocket 67, sprocket chain 74, and sprocket 73 to shaft 72 carrying pointer 75 which indicates on dial 68 the position of sensing means 90. Dial 68 may be directly 6 If the strip to be coiled is not provided with a coating of uniform thickness across its width, so that normal coiling would produce a distorted coil such as illustrated in Figure 11 for example, my apparatus may be operated so as to offset successive wraps in such manner as to produce a coil such as shown in Figure 10. To obtain this result my apparatus is operated in accordance with the procedure which has been described, but with motor 110 switched on. This motor rotates face plate 111 in a horizontal plane, causing roller 112 to move in a circular course. As roller 112 is positioned within channel 106 of cross member 105, rotation of face plate 111 produces linear movement of element in a lateral direction with respect to the strip 1. Since the cross member 105 is rigidly attached to member 96 which carries both photocell housing 98 and light source 101, these elements also move laterally of the strip with a continuous reciprocating motion. Mandrel 2 is likewise caused to move with a reciprocating motion. When sensing means 90 is withdrawn from the strip 1 so that the photocell current increases, my apparatus is set in motion in the manner previously described to move carriage 19 toward the strip 1. Mandrel 2 is likewise caused to move toward the strip 1. When sensing means 90 is moved toward the strip 1 so that the photocell current decreases, mandrel 2 is moved away from the strip 1. Mandrel 2, therefore, instead of moving in exact correspondence with random lateral movement of the strip 1, oscillates with respect to strip 1 so that successive wraps of the strip are offset with respect to each other. The rate of rotation of motor is made quite slow with respect to the speed of coiling as controlled by the rate of rotation of mandrel 2. Each successive wrap of strip is therefore offset only slightly with respect to the wrap below so that it does not project far enough to be damaged. The reciprocating or oscillating nature of the motion imparted by motor 110 to sensing means 90 causes the offsetting to proceed in one direction for a number of wraps and then in the opposite direction for a number of wraps, producing a smoothly curved sinuous or scalloped coil profile such as is illustrated in Figure 10. It will be recognized that if face plate 111 rotates at a uniform rate of speed, simple harmonic motion will be imparted to sensing means 90, and the profile of the coil edge so formed will be substantially a sine curve. The maximum amount of offset between a peak of the sinuous or scalloped coil profile and an adjoining valley will be twice the distance of roller 112 from the center of face plate 111. In one installation of my invention in an elec trotinning line a maximum offset of two to three inches has been found to be generally suflicient.

It should be understood that the reciprocation imparted to the coiling mandrel in the manner above described is in addition to reciprocation of such mandrel in response to random lateral movement of the strip. In other words, my apparatus as above described compensates for random lateral movement of the strip coming from the electrotinning apparatus and reciprocates the coiling mandrel with respect to such compensating movement, so to speak, so that the offsetting of successive wraps is uniform and determined solely by the design of the apparatus itself.

I claim:

l. Apparatus for coiling strip comprising a mandrel, means for rotating the mandrel, means for moving the mandrel laterally of the strip, sensing means positioned ahead of the mandrel adapted to detect lateral movement of the strip as it is being coiled, a primary mounting for the sensing means, means for moving the primary mounting laterally of the strip, means controlled by the sensing means for actuating both the means for moving the mandrel laterally and the means for moving the primary mounting laterally so that both mandrel and primary mounting follow lateral movement of the strip, and means 7 interposed between the .primary mounting :and sensing means for automatically imparting to Ithe sensing means periodic reciprocating motionlaterallyofithestrip .whereby successive wraps of strip coiled on the mandrel .are offset by predetermined amounts.

2. Apparatus of claim '1 in which :the means interposed between the primary mounting and the sensing means include a horizontallyextending member attached to the primary mounting and provided with ways, a member slideably mounted in these Ways carrying the sensing means, an electric motor fixedly positioned with respect to the horizontally extending member, a crank carried by the shaft of this motor, and aslidealfixedtothe member carrying the sensing means, the crank and slide cooperating to convert rotational'motion of the motor shaft to linear motion of'the sensing means.

3. Apparatus for coiling strip comprising a mandrel, means for rotating the mandrel, means for moving the mandrel laterally of the strip, sensing means positioned ahead of the mandrel adapted to detect lateral movement of the strip as it is being coiled, a primary mounting for the sensing means, means for-moving the primary mounting laterally of the strip, means controlled by the sensing means for actuating both the'means for moving the mandrel laterally and the means for moving the primary mounting laterally so that both mandrel and primary mounting follow lateral movement of the strip, and means rotating at constant speed interposed between the primary mounting and sensing means for imparting to the sensing means simple harmonic motion laterally ofthe strip whereby successive wraps of strip coiled on the mandrel are olfset by predetermined amountsto form a coil edge of sinuous profile.

4. Apparatus for coiling strip comprising a mandrel, means for rotating the mandrel, means for moving the mandrel laterally of the strip, sensing means positioned ahead of the mandrel adapted to detect-lateral movement of the strip as it is being coiled, a primary mounting for the sensing means, means for moving the primary mounting laterally of the strip, means controlled by the sensing means for actuating both the means for moving the mandrel laterally and the means for moving the primary mounting laterally so that both mandrel and primary mounting follow lateral movement of the strip, and means interposed between the primary mounting and the sensing means for automatically imparting to the sensing means periodic reciprocating motion laterally of the strip about a mean position corresponding to that of the strip edge whereby successive wraps of strip coiled on the mandrel are oi'fset by predetermined amounts to form a coil edge of smoothly curved wavy profile 5. Apparatus for coilin strip within a predetermined range of widths comprising a mandrel, means for rotating the mandrel, means for moving the mandrel laterally of the strip, sensing means positioned ahead of the mandrel adapted to detect lateral movement of the strip as it is being coiled, a primary mounting for the sensing means, means for moving the primary mounting laterally of the strip, a secondary mounting carried by the primary mounting and movable therein laterally of the strip, said secondary mounting supporting the sensing means, means controlled by the sensing means for actuating both the means for moving the mandrel laterally and the means for moving the primary mounting laterally so that both mandrel and primary mounting follow lateral movement of the strip, means interposed between the secondary mounting and sensing means for automatically imparting to the sensing means periodic reciprocating motion with respect to the secondary mounting, manually controllable means for adjusting the lateral position of the secondary mounting relative to the primary mounting whereby the sensing means can be set to reciprocate about the nominal position of an edge of strip of any width within the pre determined range, and means actuated by movement of thesecondaryirnountingto indicate the vwidth of, strip for whichtth'e-sensing means is set.

i6, Apparatus iforzcoiling strip :within a predetermined range of widthsrcomprising a-mandrel, meansfor rotating the imandrel, means 'for moving the mandrel laterally of the strip, :sensingmeans positioned ahead of the mandrel adaptedztodetect lateral movement of the strip as it is :being coiled, a primary mounting for the sensing means,-means:for movingzthe primary mounting laterally ofithe strip a secondary mountingcarried by the primary mounting and movable :therein laterally of the strip, said secondarytmounting supporting the sensing means, means controlledibysthe-sensing means for actuating both the means Efor movingrthe mandrel laterally and the means for movingtheiprimary:rnounting-laterally so that both mandrel anduprirnaryrmounting follow lateral movement oflthe.strip,.manually.controllable means for adjusting the lateral position.of=the {secondary mounting relative to the primary mounting whereby the sensing means can be set at the nominal positionofl-an edgeof .striptof any width within the predetermined range, a freely rotatable shaft journaled. in theprimary mounting with its .aXisparallel to the direction of .movement of the secondary mounting and provided witha spiral groove disposed about its-surface, a pin rigidlyattached lZOIlZhQSBCOIldfll'Y mounting and cooperating .with:th e spiral groove in the freely rotatable shaft to convert linear movement of the sec ondary mounting into rotation of the shaft, a dial provided with'aseale, apointer movable overthis scale, and means for imparting therotation .of the shaft to the pointer.

7. Apparatus for co'iling stripr-within .aI-predeterrnined range of widths comprising a mandrel, means forrotating the mandrel, means for :moving the-mandrel laterally of the strip, sensing means positioned ahead of the mandrel adapted to detect lateral movement of thestrip as it is being'coiled, a-primary mountingfor the sensing means, means for moving the primary mounting laterally of the strip, a secondary mounting carried by the primary mounting and movable therein laterally of the strip, said secondary mounting supporting the sensing means, means controlled by the sensing means for-actuating both the means for moving the mandrel laterally-and the means for moving the-primary mounting-laterally so that both the -mandrel and the primary -mounting follow lateral movement of thestrip, manually controllable means for adjusting the lateral position-of thesecondary mounting relative to the primary mounting whereby the sensing means can be initially-set at a position corresponding to the nominal position of an edge of strip ofany width within the predetermined range, and'means interposed between the secondarymounting-and the sensing means for imparting to the sensing means reciprocating motion laterally of the strip whereby successive wraps of strip coiled on the mandrel are offset by predetermined amounts.

8. Apparatus for coiling strip within a predetermined range of widths comprising a mandrel, means for rotating the mandrel, means for moving the mandrel laterally of the strip, sensing means positioned ahead of the mandrel adapted to detect lateral movement of a strip edge-as the strip is being coiled, a primary mounting for the sensing means, means for moving the primary mounting laterally of the strip, a secondary mounting carried by the primary mounting and movable thereinalterally of the strip, said secondary mounting supporting the sensing means, means controlledby the sensing means for actuating both the means for moving the mandrel laterally and the means for moving the primary mounting laterally so that both the mandrel and the primary mounting follow lateral movement of an edge of; the stripbeing coiled, manually controllable means for adjusting the lateral'position of the secondary mounting relative to the primary mounting whereby the sensing means can be initially set at a position corresponding to an. edge of strip of any References Cited in the file of this patent UNITED STATES PATENTS 2,281,965 Wylie May 5, 1942 2,622,655 Todd Dec. 23, 1952 2,672,299 Jones Mar. 16, 1954 

